The Mechanical Properties of Compact Titanium Produced from Titanium Hydride Powders Using Self-Propagating High-Temperature Synthesis

Abstract

The mechanical properties of titanium compacted from titanium hydride produced by standard treatment of titanium sponge in hydrogen and by self-propagating high-temperature synthesis are compared. It is shown that the strength and plastic characteristics of titanium from powders hydrogenated by self-propagating high-temperature synthesis are not worse and sometimes even better than those of titanium produced in the same way from hydride powders resulting from standard method. It was determined that titanium sintered from powders hydrogenated by self-propagating high-temperature synthesis contains, as a rule, more oxygen compared to titanium sintered from powders hydrogenated by heat treatment in hydrogen. However, titanium made of powders resulting from self-propagating high-temperature synthesis contains a lower amount of other impurities that decrease its plasticity. It is assumed that the yield stress and ultimate strength as well as the plastic characteristics of titanium sintered from powders produced by different methods are determined by the quantitative and qualitative composition of impurities.